<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.io.*,java.util.*" %>
<%
   // 获取session创建时间
   Date createTime = new Date(session.getCreationTime());
   // 获取最后访问页面的时间
   Date lastAccessTime = new Date(session.getLastAccessedTime());

   String title = "test";
   int visitCount = 0;
   String visitCountKey ="visitCount";
   String userIDKey ="userID";
   String userID = "ABCD";
   int time=60;

   // 检测网页是否有新的访问用户
   if (session.isNew()){
      title = "first reads";
      createTime = new Date(session.getCreationTime());
      visitCount=0;
      session.setMaxInactiveInterval(time);
      session.setAttribute(userIDKey, userID);
      session.setAttribute(visitCountKey,  visitCount);
   } else {
       visitCount = (int)session.getAttribute(visitCountKey);
       visitCount++;
       userID = (String)session.getAttribute(userIDKey);
       session.setAttribute(visitCountKey,  visitCount);
   }
%>
<html>
<head>
<title>Session 跟踪</title>
</head>
<body>

<h1>Session 跟踪</h1>

<table border="1" align="center"> 
<tr bgcolor="#949494">
   <th>Session 信息</th>
   <th>值</th>
</tr> 
<tr>
   <td>id</td>
   <td><% out.print( session.getId()); %></td>
</tr> 
<tr>
   <td>创建时间</td>
   <td><% out.print(createTime); %></td>
</tr> 
<tr>
   <td>最后访问时间</td>
   <td><% out.print(lastAccessTime); %></td>
</tr> 
<tr>
   <td>用户 ID</td>
   <td><% out.print(userID); %></td>
</tr> 
<tr>
   <td>访问次数</td>
   <td><% out.print(visitCount); %></td>
</tr> 
<tr>
   <td>session时间</td>
   <td><% out.print(time); %></td>
</tr> 
</table> 
</body>
</html>